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Mean Calculator – Average of Numbers
Quick answer
If values are 12, 15, 15, 18, 22, 27, 31, the mean is 20.
Mean = sum of values ÷ number of values.
Enter your values
- 12
- 15
- 15
- 18
- 22
- 27
- 31
7 values
Mean
20
The arithmetic average — every value added together, divided by how many there are.
You enter Values 12, 15, 15, 18, 22, 27 … (7 values). You get Mean 20.
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About the Mean Calculator – Average of Numbers
The mean, or average, is the sum of all the values divided by how many there are. It is the most common way to summarise a set of numbers — marks, prices, sales or measurements. Enter your values to see the mean.
The mean of 12, 15, 15, 18, 22, 27 and 31 is about 20.
Mean
Mean = sum of values ÷ number of values
Things to keep in mind
- The mean is pulled up or down by extreme values; the median can be a better summary when there are outliers.
- The mean always lies between the smallest and largest value.
- For a weighted average, multiply each value by its weight first.
STATISTICS & PROBABILITY GUIDE
A quick guide to Mean
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How to Use the Mean Calculator
1
Enter Values
Provide your values.
2
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What is Mean?
This statistics & probability tool works out your mean instantly, so you don't have to do the math by hand.
“One quick calculation, so you always know your mean before you decide.”
What Affects Your Mean
Your mean depends on the values below.
Values
Changing your values changes your mean.
Example Result
Here's what you can expect from a mean calculation:
- Mean
- 20
Frequently Asked Questions
- How to calculate mean?
- Fill in values in the Mean Calculator – Average of Numbers above and your mean is calculated instantly. Change any value to see how the result responds.
- What does an example mean calculation look like?
- If values are 12, 15, 15, 18, 22, 27, 31, the mean is 20.
- Is this calculator free to use?
- Yes — every calculator on this site is completely free, with no sign-up or account required.
- How accurate is this calculator?
- It uses the standard formula and calculates on our server for every request, so results are precise for the values you enter.
- Is my data saved anywhere?
- No. Nothing you enter is stored or sent anywhere unless you choose to share a link with your values included.
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